10. Does the subject have adequate circulation to the foot as evidenced by an Ankle Brachial Index (ABI) of 0.8 - 1.2; or if the ABI is greater than 1.2, does the subject show toe pressures >40 mmHg, or transcutaneous oximetry (TcPO2) > 40 mm Hg, or does the subject show adequate circulation on an arterial Doppler study? (ABI or Doppler results must be < 45 days old.)